The Sensirion LG01-2000A090 is a liquid flow switch and bubble detector based on thermal measurement principles. Its non-invasive design measures flow through the wall of a straight glass capillary, ensuring no contact between the sensor electronics and the fluid. The sensor outputs a simple 5V signal when flow exceeds 4.5 ml/min, and 0V when flow is below the threshold or when air bubbles are detected.

Key Features

• Ultra-Low Flow Detection: Switching threshold of 4.5 ml/min for water.
• Non-Invasive Measurement: No fluid contact, excellent chemical resistance and bio-compatibility.
• Integrated Bubble Detection: Detects air bubbles, outputting 0V when present.
• Fast Response: < 100 ms response time.
• Simple 0/5V Output: Easy integration into control systems.
• Compact Size: 53 x 22 x 9 mm, ideal for space-constrained OEM equipment.

Applications

Diagnostic and medical instruments, laboratory automation, analytical equipment, cooling systems, and industrial OEM devices requiring low-flow monitoring with bubble detection.